Abstract
Stimulated Brillouin scattering in optical fibers can be used to measure strain and temperature in a distributed manner. To improve the spatial resolution of these measurements, shorter pulses must be used, resulting in reduced signal strengths causing a degradation of strain and temperature resolution. This paper studies the dependance of the Brillouin loss spectrum on the pump pulse width. Theoretical and experimental results display the nonlinear variations in the Brillouin peak power and linewidth over a range of pulse widths from 10 to 4000 ns.
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